Bizhub C220, does not recognize new black toner, pale black copy

[Nico.FRA]

Re: Bizhub C220, does not recognize new black toner, pale black copy

Do this on my own free time so i don't mind helping guys who try, believe in the right to repair these machines.
Don't give up yet. Its a pity you can't find a decent tech around there. There are good secondhand finds out there.
Trick there is to find a machine that just came from contract and the PM condition is good.
Then only would it be a good buy.

But continue to repair the machines you have.
Probably a simple problem one of use can repair in less than 30min.


Curious about the total count on the machine?

"Thank you for still being there, the counter displays 46,859 copies ... but in reality even less, we were surprised to see that at the time when we were under contract with Konika, the counter took several times 500 copies of mysterious way (...)"
Thank you for still being there, the counter displays 46,859 copies ... but in reality even less, we were surprised to see that at the time when we were under contract with Konika, the counter took several times 500 copies of mysterious way (...)"Thank you for still being there, the counter displays 46,859 copies ... but in reality even less, we were surprised to see that at the time when we were under contract with Konika, the counter took several times 500 copies of mysterious way (...)

[Nico.FRA]

Re: Bizhub C220, does not recognize new black toner, pale black copy

That slipped my mind.
Sometimes the simple things that gets overlooked.
Could be a soiled laser glass.

Otherwise a bad bias voltage connection to the dev tank.

"For a bad connection of bias voltage to the development tank, how do you know?"
"For a bad connection of bias voltage to the development tank, how do you know?

[allan]

Re: Bizhub C220, does not recognize new black toner, pale black copy

Light copies would be an effect of a bad bias connection.
Even bad primary transfer could be possible adjust that under image process adjustment to see if there is any change there.
Difficult to determine because of the machine layout and the nature of the voltage.

At less than 60K prints the machine should be in good fair condition counting in its age.

Not a fan of faulty high voltage power supplies because i never encounter them, but possible.
But you could strip the machine to check the condition of the spring contacts to check for corrosion.
This is where thinks gets more risky removing and reinstalling electronic prints.

Afraid that i could take you down the wrong rabbit hole here.

Print and post a demo page from the machine panel and post that.

Did you inspect the laser glass and cleaned that?
So your TCR value stays around 6.5% now?

[Nico.FRA]

Re: Bizhub C220, does not recognize new black toner, pale black copy

Light copies would be an effect of a bad bias connection.
Even bad primary transfer could be possible adjust that under image process adjustment to see if there is any change there.
Difficult to determine because of the machine layout and the nature of the voltage.

At less than 60K prints the machine should be in good fair condition counting in its age.

Not a fan of faulty high voltage power supplies because i never encounter them, but possible.
But you could strip the machine to check the condition of the spring contacts to check for corrosion.
This is where thinks gets more risky removing and reinstalling electronic prints.

Afraid that i could take you down the wrong rabbit hole here.

Print and post a demo page from the machine panel and post that.

Did you inspect the laser glass and cleaned that?
So your TCR value stays around 6.5% now?

"I had already checked the HV card, the springs were normal (no oxidation). By "Laser glass" you mean the PH unit Window, right? I will see that. The TCR level is currently at 6.57. Here is the photo Shared album - Nicolas Perrier - Google Photos (the scan has a network problem) of the page testvia the service interface. For information, I also made the dev unit k contacts with a contact cleaning spray (relay card and contactors of the company)"

[allan]

Re: Bizhub C220, does not recognize new black toner, pale black copy

Would be a complete overlook if you find the PH glass window dirty...
So you have changed out the drum...
Only other thing would be the transfer belt and transfer belt contacts.
Then i am out of advice.

Looks like you have done everything you can so far. Looks like you need to stick to this model now seeing that you know more about it than some techs out there.